21821779

素因数分解:

$7^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:207

約数の個数: 24

約数和(自身を含む): 26756352

約数和(自身を除く): 4934573

約数列:

[1, 7, 23, 71, 83, 161, 497, 529, 581, 1633, 1909, 3703, 5893, 11431, 13363, 37559, 41251, 43907, 135539, 262913, 307349, 948773, 3117397, 21821779]

約数ペア:

[(1, 21821779), (7, 3117397), (23, 948773), (71, 307349), (83, 262913), (161, 135539), (497, 43907), (529, 41251), (581, 37559), (1633, 13363), (1909, 11431), (3703, 5893)]